My current project requires me to read a ppm signal from 7 devices. The code I used to read the RPM of 1 fan uses an external interrupt. Since the ATMEGA 328 only has 2 external interrupts a friend of mine came up with the idea of using a MUX, specifically the 74HC153
to switch between devices. This would allow me to connect up to 8 devices on just 2 digital pins.
Multiplexers are completely new to me and I am just trying to wrap my head around how and if this will work. I am still waiting on the MUX to arrive from electronic goldmine so I can not breadboard it yet.